Machine



2 Sheets-Sheet 1.

P. A. MALM.

PAPER CUTTING MACHINE.

(No Model.)

No. 508,329. Patented Nov. 7, 1893.

llVl/E/VTOR Ia lend. Jlalmn WITNESSES- Bj/ ATTOR/VEVS% m: runomu. Lrmoammmu cumum.

P. A; MALM. PAPER CUTTING MACHINE.

2 Sheets-Sheet 2.

(No Model.)

No. 508,329. Patented Nov. 7, 1893.

llVl/E/VTOR. jelerfl. Malnv.

ATTORNEYS.

WITNESSES:

ms NATIONAL umusmwmwa COMPANY.

WASHINGTON. n. :4

UNITED STATES PA"1ENT OFFICE.

PETER AIMALM, on NEW YORK, N. Y.

PAPER-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 508,329, dated November 7, 1893. Application filed February 9,1893- Serial No. 461,642. (N0 model.)

To all whom it may concern:

Be it known that I, PETER A. MALM, acitizen of the United States, residing at New York, in the county and State of New York, have invented new'and useful Improvements in Paper-Cutting Machines, of which the following is a specification.

This invention relates to certain improvements in that class of paper cutting machines in which the paper clamp is depressed upon the paper with 'a force commensurate to the resistance met by the knife, while cutting through the paper.

The peculiar and novel construction of my machine is pointed out in the following specification and claims and illustrated in the accompanying drawings in which- Figure l,represents afront elevation. Fig. 2, is a transverse vertical section in the plane x a: Fig. 1. Fig 3, is a similar section in the plane y 3 Fig. 1. Fig. 4, is a rearelevation. Fig. 5, is a horizontal section in the plane 2 a Fig. 1. Fig. 6, is a transverse vertical sec- .tion in the plane to to Fig.- 1. Fig. 7, is a transverse section in the plane 4) -v Fig. 1.

In the drawings the .letterA designates the frame which supports the table B and forms the guide for the head or stock 0 which carries the knife D and also for the clamp E. Said frame forms the bearings for the driving shaft 10, on which are mounted the flywheel 11 and the fast and loose pulleys 12, 13, and also two cog wheels 14, 15, which turn loosely thereon but can be thrown in gear with it by means of a-clutch sleeve 16. This clutch sleeve is feathered to the driving shaft and it is actuated bya bell crank lever 17, 18, (Figs. 3 and 4,) which has its fulcrum on a pin 19 secured in a fixed bracket 20 and the vertical arm 17 of which engages a groove in the clutch sleeve, while its horizontal arm 18 connects by a rod 24 with an arm 25, which extends from a rock shaft 21 mounted in the lowerportion of the frame and carrying a treadle with two steps 22, 23, formed on the opposite sides of the rock shaft 21. If the step 22 of the treadle is depressed, the clutch sleeve 16 is thrown in positive engagement with the cog wheel 14 by teeth 26 formed on the clutch sleeve andengaging corresponding teeth formed on the cog wheel, but if the step 2310f the treadle is depressed the clutch sleeve 16 is thrown in engagement with a friction cone 27 formed on the cog wheel 15. (See Figs. 4 and 5.)

The cog-wheel 14 engages a cog-wheel 28 (Figs. 3 and 5) mounted on or secured to the inner end of asleeve 29 which is mounted on a shaft 30 and thrown in engagement with the same by a feather key 31 (Fig. 5) and on the outer end of the sleeve 29 is secured acog Wheel 32, which is geared by means of an intermediate cog wheel 33 with the cog wheel 15 '(see Fig. 2), so that, when the cog wheel 14is thrown in engagement with the driving shaft 10, the shaft 30 turns in a direction opposite to that in which the d riving shaft turns,and if the clutch sleeve 16 is thrown in engagement with cog wheel 15, the shaft 30 rotates in the same direction as the driving shaft 10. The sleeve 29 turns loosely in a journal box 34 support ed by a fixed bracket 35. On the shaft 30 is formed a screw thread 36 which engagesa nut 37 and in the example shown in the drawings this screw thread. is left handed, so that, if the shaft 30 is turned'in the direction of the arrow marked on it in Fig. 5, the nutis drawn inward and vice versa, but it is obvious that a right handed screw thread might be used, in which case the revolving motion of the shaft 30 would have to be reversed.

The nut 37 connects by links 38 with arms 39 which extend from a rock shaft 40 (Figs. 1, 4 and 7) and this rock shaft connects by an arm 41 with a rod 42, the upper end of which is pivoted to the arm 43 of a lever provided with three arms 43, 44, and 45 and fulcrumed on a fixed pin 46. The arm 44 of this lever connects by a link 47 with the clamp E (best seen in Fig. 4) and the arm 45 of said lever connects by a rod 48 with a bell crank lever 49,which is connected by means of link 50 with the clamp E, the link 50 being near one and the link 47"near the opposite end of the clamp, so that, when the nut 37 is moved by the action of the screw thread 36, the clamp is uniformly depressed or raised throughout its entire length. On the shaft 30 is also mounted a head 51 which is prevented from moving endwise on said shaft by two collars 52, which are firmly secured on the shaft and abut against shoulders 53 formed in theinterior of the head. (See Fig. 5.) This head connects by 1inks'5'1twith a forked lever 55 (Figs. 1, 4 and 6) which has its fulcrum on a fixed pin 56 and the lower end of which is connected by a pin 57 with two bars 58, 59, which extend in opposite directions. The bar 59 connects by means of an arm 60 with a rock shaft 61 (Figs. 1, 4, 5 and 7) which is journaled in fixed bearings 62 and which connects by means of an arm 63 and rod 64 with the knife stock 0. The bar 58 which extends from the pin 57 in a direction opposite to the bar 59, connects by means of an arm 65 with a rock shaft 66 (Figs. 1, 2, 3 and 4) which is mounted in fixed bearings 67 and connects by an arm 68 and rod 69 with the knife stock 0. In the bar 59 is secured a pin 70 from. which extends a rope 71 over pulleys 72, 73, 74, toa weight 75 which normally rests upon the ground and is heavy enough to balance the weight of the knife stock and of the clamp.

When the-clamp E has been brought .in contact with the pile of: paper by the action of the screw thread 36 upon the nut 37, its downward movement is arrested and as the screw shaft 30 continues to rotate, it is caused to move in the direction of its axis and consequently the head 51 begins to move in the direction of the arrows marked on it in Figs. 1 and 4. By this movement the forked lever 55 iscaused to swing in the direction of arrow 6 (Figs. 1 and 4) and the bar 59 is drawn inward while the bar 58 ispushed outward and by the action of these bars upon the rock shafts 61 and 66, the knife stock 0 is caused to move down,-and as the knife when it begins to cut, meets with a' resistance, the screw 36 -acts upon the nut 37 and the clamp is drawn farther down so as to exert upon the paper a pressure commensurate to the resist. ance which the knife has to overcome in cut ting. At the same time as the knife descends, the weight 7 5 is raised up. When the? knife has cut clear through the paper, the head51 strikes a lip 7 6which projects from'a slide 77. 1 (Best seen in Fig. '4.) This slide connects with the vertical arm 78 of abell crank lever which has its fulcrum on a fixed pin 79 and the horizontal'arm 80 of which connects by a. rod 81 with the horizontal arm .18 of the clutch lever 17,18, so that when the slide77' is caused to move in the direction of arrowf7 the clutch sleeve 16, which during the operation of-cutting is in gear with thecog wheel 1% (Fig. 4), will be automatically thrownout of gear with said cog wheel 14: and in gear with the cog wheel 15"and'the direction in. which thescrew shaft turns during the oper ation of cutting, is reversed, so that the clamp and the knife stock are returned to the positions shown in Figs.1 and-4, which operation is facilitated by the weight 75. During this reversingmovement the step 23 of the treadie must be depressed.

witnesses.

What I claim as new,. and desire to secure 1 byLetters Patent, is-

1. The combination with clamp, and a knife stock, of a lengthwise sliding and rotating shaft having a screw-threaded portion and an unthreaded portion, a nut engaging 'the threaded portion and connected with the clamp, a non-rotary head held constantly on .the unthreaded,portion against movement along the length of the shaft but movinglongitudinally therewith, and connections between said head and knifcstock, substantially as described.

2. The combination with a clamp, and a knife stock, of a lengthwise sliding and rotating shaft l1aving..a .screw threaded port on and anunthreaded iportion, a nutijengagmg the threaded: portion act ;the 1 shaft. and :con- 'nected .with the clamp, .a ,non-rotary ihcfl held-constantly on sthe unthreadediport'lcn i against movement along the' lengthuof the shaft but moving longitudinally therewith, connections between saidihead and the knife 1 stock, a reversing mechanism for saidashaft,

and connections between the non-rotary head and the reversing 1 mechanism, substantially as described.

3. The combination with.a clamp, and a knife stock,.of a slidingand rotatingshaft having a screw threaded: portion 1 and anilinthreaded portion, a nut engaging "the screwthreaded portion ofthe shaft and connected to the clamp,a headmounted on the unthreaded portion of the shaft so. as to be compelled to partake of its'sliding but; not of its rotary motion, connecting devicesbetween thehead .and1theknife stock, a balance weight suspended from and raised .by the connecting devices between the head and the knife stock, and. a reversing gear, substantially,.-asudescribed.

4. The combinationwith the clamp E, rod

42 and: mechanism for imparting motion a to this rod, of the three.armed.lever.=4=3, 1 1, and

45, the link 47, the rod 48, the bcllcranklever49, and the link 50,.substantially;.as described.

. 5. The combination with the knifeistockC of the lever 55, means for actuatingth istlever, the rods 58, 59, connected to saidilcver and extending in opposite directions, thetarm 60 connected to the rod; 59, therock shaft61, the arm 63. and the rod .64 connected to one end of the knifestock, theiarm 65. connected to the. rod, 58,,therock .shaftu-66,.the; arm"68.

and rod 69 connected to: the opposite end of the knife stock, substantially .asdescribed.

In testimony whereof I have hereunto set my hand in the presence of two subscribing PETER A. M'ADM. 

